PROBLEM TO BE SOLVED: To realize a load detection device capable of suppressing deterioration of load detection accuracy over time. A load detection device (1) according to an embodiment of the present disclosure includes a load detection unit (11) having a curved surface (11a), an application member (12) having a flat surface (12a), and a load detection unit (11) between the load detection unit (11) and the application member (12). And a transmission member 13 arranged. The curved surface 11a of the load detection unit 11 and the first surface of the transmission member 13 are in point contact with each other, and the flat surface 12a of the application member 12 and the second surface of the transmission member 13 opposite to the first surface are surfaces. Contact. When a shear force acts on the load detection device 1, the sliding amount of the applying member 12 with respect to the transmission member 13 is larger than the sliding amount of the load detection unit 11 with respect to the transmission member 13. [Selection diagram] Figure 2【課題】経時的な荷重検出精度の悪化を抑制可能な荷重検出装置を実現する。【解決手段】本開示の一形態に係る荷重検出装置１は、湾曲面１１ａを有する荷重検出部１１と、平坦面１２ａを有する印加部材１２と、荷重検出部１１と印加部材１２との間に配置される伝達部材１３と、を備える。荷重検出部１１の湾曲面１１ａと伝達部材１３の第１の面とは点接触し、印加部材１２の平坦面１２ａと伝達部材１３における第１の面と逆側の第２の面とは面接触する。荷重検出装置１にせん断力が作用した場合、伝達部材１３に対する印加部材１２の摺動量は、伝達部材１３に対する荷重検出部１１の摺動量より大きい。【選択図】図２
